Geometrical instruments
Patent
1978-07-21
1979-09-25
Lake, Roy
Geometrical instruments
339 9RY, H01R 3900
Patent
active
041688724
ABSTRACT:
A hollow rotatable shaft supported by bearing means surrounds a rivet extending through both ends thereof and rotatable therewith. A non-rotatable contact is connected to a terminal adjacent one end of the shaft and in brushing contact with one end of the rivet. A mechanical coupling is located at the opposite end of the shaft whereby the shaft, rivet and coupling are rotatable as a single unit and electrical current may pass through the rivet as the unit is rotating.
REFERENCES:
patent: 2284384 (1942-05-01), Evans
patent: 2537714 (1951-01-01), Spielman
Gealow Jon Carl
Jones DeWalden W.
Lake Roy
LaPorte Ronald J.
Mansfield Bruce R.
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